The safe operation of electronic converters is dependent on the maximum permissible temperature not being exceeded at the measuring point. Vossloh-Schwabe has determined a casing temperature measuring point - tc max. - on all converter casings. To avoid shortening the service life of these devices, the stipulated maximum temperature must not be exceeded at this tc point under any circumstances. This point is determined by testing the converter during normal operation in an IEC-standardised box at the specified ambient temperature (ta), which is also indicated on the typeplate. As both the design-related ambient temperature and the converter´s own heat generation as determined by the installed load are subject to great variation, lamp manufacturers should test the casing temperature at the converter´s tc point under real installation conditions. Temperature-protected converters feature a further protection symbol, a triangle containing the maximum temperature. This symbol certifies that the respective device is equipped with additional protection against overheating and specifies that the surface temperature of the casing must not exceed the value stated within the triangle under any circumstances.
Vossloh-Schwabe electronic converters are tested in accordance with EN 61347. Function tests are carried out in accordance with EN 61047. VS converters can be operated without causing any inadmissible system reactions, as all devices comply with EN 61000-3-2 on the limitation of mains harmonics. They also meet the EMC requirements of EN 61547; these devices are thus also protected against mains surges that can be caused by, for instance, inductive ballasts during combined operation of fluorescent and low-voltage halogen lamps. In addition, all devices comply with the RFI requirements of EN 55015. As the highly effective integrated filter can only limit the unit´s own interference, the secondary conductor should be kept to under 2 metres in length so as to avoid RFI interference in the lighting system.
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